Gas-heater.



Mmmm July 23, 19118;

S. 1L. SMITH.

GAS HEATER.

APPLICATION FILED APR SFDNEY JD. Slllll'llll, @F PITTSBURGH, JPENSYLVAN 1A.

GAS-HEATER.

aaraaea Specication of Letters Patent.

Fat'ented duly 23, tml@o Application tiled. April 25, 1918. Serial No. 230,779.

To all whom t may concern:

j Be it known that l, Similar L. SMITH, a citizen ofthe United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gras-Heaters; and ll do declare the following to be a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its principal obj ect to provide an extremely simple and inexpen sive, yet a highly eilicient gas heater which will become incandescent and consume a large proportion of air, thus rendering: it very economical.

ln carrying out the above object, inner and outer mantles are' provided, made of fire clay or the like, and the combustion of gas and air takes place between them, a further All lill

vmant es.

object being to provide novel means for supplyln an abundance of air between said A still further object is to provide an extremely simple, strong and durable gas lsupply and supporting means for the mantles.

llllith the foregoing general objects in view, the invention resides inthe novel features of construction and unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawings which form a part of this specification and in which:

Figure 1 is a vertical longitudinal section of the improved heater; and

Figs. 2 and 3 are'horizontal sections on the planes` of the lines 2-2 and 3-3 respectively o Fig. 1.

ln the drawings above briey described, the numeral 1 designates a suitable base hav ing therein a gas passage 2 opening through its upper end, gas being supplied to said passage by a suitable nipple or the like 3 preferably having a gas cock l. rlhreaded into the upper end of the base 1 is a tubular nipple 5 formed integrally with and depending from the enlarged lower end 6 of a vertically disposed cast metal standard 7 of pipe-like formation. By means of arestricted passage 8, the gas from the nipple 5 is discharged into'the enlarged end 6 of the `standard 7 and in orderthat the required amount of air may mix with .this gas, said enlarged standard end 1s provided integral outstanding annular flange 13 projecting horizontally and formed with air inlet perforations 14 adjacent the head.

Resting on the outer portion of the flange 13 is a substantially cylindrical outer mantle 15 in the form of a continuous wall of tire clay or the like, said mantle having a covering 16 of metal whose lower end surrounds the flange 13 and is secured thereto by screws or the like 17. Circumscribed by the outer mantle 15 is an inner mantle 18 preferably of the solid formation depicted in Fig. 1, this mantle being also of substantially cylindrical formation and spaced slightly from the outer mantle 15 to provide an annularl space 19 in which the mixture of 'air and gas burns.. rFhe gas and air from the standard 7 are supplied to the space 19 between the head 11 'and the lower end of the inner mantle 18, and in order thatsuch supply may be controlled to produce the best results, it is preferable that this mantle be movable toward and away from the head. 'lo this end, the mantle in question is shown resting onl a horizontal disk 20 carried by the upper end of a tubular mantle support 21 which is slidable in the standard 7. Any preferred means can be employed for centering the mantle 18, but the disk 20 is shown provided with an upstanding projection 22 received in a socket 23 in the lower end of said mantle, said projection being by preference of tubular formation.

rllhe gas and air from the interior of the support 21 are discharged into the cavity 12 by means of one or more vertical slots 24 and in order that the discharge of gas from said cavity may be controlled as required, ll have shown a gear and rack 25 for adjusting the supportl 21 vertically, a suitable dog or the like 26 being employed for holding said oear and rack against further movement af-ter being once adjusted as required. 'lhe gear is shown provided with 4 an operating knob 27 and a similar knob 28 lltl the support 21.

In order to obtain the best results, it is necessary that abundance of air be supplied to the space 19 for mtermixture and coml bustion with the gasand air discharged from small quantity of highly the cavity 12. Some of this extra air 1s supplied through the-perforations 14 but the majority thereof enters from perforations 29 and 30 in the outer mantle 15 'and its covering 16 respectively. These perforations are preferably arranged in vertically spaced circular rows and in order that any relative movement of the mantle and covering under expansion and contraction may not prevent the passage of air into the space 19, said mantle is provided with a plurality of circumferential. external grooves 31 with which both sets of perforations 29 and 30 communicate. It will thus be seen that even should the perforations 29 and 30 be moved out of alinement, the air will enter through the former into the grooves 31, and will travel -from the latter into the space 19 through the perforationsv 29. f

In operation, the inner. and outer mantles heat to incandescence and will raise the temperature of a room in exceptionally short order. After the mantles have been once heated to the maximum, the gas supply may be greatly cut down, since the air entering through the several perforations is heated and expanded by the incandescent mantles and burns effectively with a fuel, thus rendering the device extremely economical. The heater may be used either vertically or in other positions, but the vertical arrangement is preferable. Furthermore, it is to be understood that one or more of the devices may be placed in the fire box'l of. a stove or furnace to take the place of the usual solid fuel fire, and n order that the heater may be effectively anchored when so used, or in fact regardless of its use, the 'standard 7 is by preference provided with an annular flange32 below the flange 13. This flange 32 is provided with bolt or screw holes in order that braces or other anchoring means may be easily attached thereto.

From the foregoing, taken in connection w1th the accompanying drawing, it will be obvious that although my invention is of comparatively simple and inexpensive nature, it will be highly efficient and desirable. Since probabl-y the best results are obtained from the -exact details shown and described, they are preferably employed, but within the scope of the invention as claimed, numerous minor changes may well be made.

I claim:

1. A gas heater comprising a base having a gas passage which opens through its upper end, a castI metal pipe-like standard rising from said base in communication with said passage, the lower end of said standard having an air inletand the upper end thereof being provided with an enlarged integral head, said head having in its upper end a central cavity of greater diameter than the bore of said standard and into which said bore opens, the lower end of said head being provided with an integral outstanding annular flange formed with perforations ad] a -cent said head, an outer perforated mantle of cylindrical wall-like formation resting on said flange, an innerA substantially cylindrical mantle circumscribed by said outer mantle and spaced slightly therefrom, and means supporting said inner mantle a' slight distance above said head to permit the escape of gas into the space between the two mantles. A

2. A gas heater comprising'an outer mantle of wall-like formation, an inner mantle circumscribed by said outer mantle, means for supplying gaseous fuel to the space between said mantles, said louter mantle having perforations fof admitting air to said space, and a metal covering surrounding said outer mantle and having other air inlet perforar tions, said outer mantle having external grooves with which the perforations of said mantle and said covering communicate, substantially as and for. the purpose set forth.

In testimony whereof I have hereunto set my hand.

SIDNEY L. SMITH. Witnesses:

QI. A. MERCER, M. MostmAK. 

